/arch/powerpc/include/asm/runlatch.h

https://github.com/aicjofs/android_kernel_lge_v500_20d_f2fs · C Header · 45 lines · 32 code · 5 blank · 8 comment · 6 complexity · f9327400302e5c047d560337f08a690a MD5 · raw file 

    

  1. /*
    2. 

  2.  * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
    3. 

  3.  */
    4. 

  4. #ifndef _ASM_POWERPC_RUNLATCH_H
    5. 

  5. #define _ASM_POWERPC_RUNLATCH_H
    6. 

  6. 

  7. #ifdef CONFIG_PPC64
    8. 

  8. 

  9. extern void __ppc64_runlatch_on(void);
    10. 

  10. extern void __ppc64_runlatch_off(void);
    11. 

  11. 

  12. /*
    13. 

  13.  * We manually hard enable-disable, this is called
    14. 

  14.  * in the idle loop and we don't want to mess up
    15. 

  15.  * with soft-disable/enable & interrupt replay.
    16. 

  16.  */
    17. 

  17. #define ppc64_runlatch_off()					\
    18. 

  18. 	do {							\
    19. 

  19. 		if (cpu_has_feature(CPU_FTR_CTRL) &&		\
    20. 

  20. 		    test_thread_local_flags(_TLF_RUNLATCH)) {	\
    21. 

  21. 			unsigned long msr = mfmsr();		\
    22. 

  22. 			__hard_irq_disable();			\
    23. 

  23. 			__ppc64_runlatch_off();			\
    24. 

  24. 			if (msr & MSR_EE)			\
    25. 

  25. 				__hard_irq_enable();		\
    26. 

  26. 		}      						\
    27. 

  27. 	} while (0)
    28. 

  28. 

  29. #define ppc64_runlatch_on()					\
    30. 

  30. 	do {							\
    31. 

  31. 		if (cpu_has_feature(CPU_FTR_CTRL) &&		\
    32. 

  32. 		    !test_thread_local_flags(_TLF_RUNLATCH)) {	\
    33. 

  33. 			unsigned long msr = mfmsr();		\
    34. 

  34. 			__hard_irq_disable();			\
    35. 

  35. 			__ppc64_runlatch_on();			\
    36. 

  36. 			if (msr & MSR_EE)			\
    37. 

  37. 				__hard_irq_enable();		\
    38. 

  38. 		}      						\
    39. 

  39. 	} while (0)
    40. 

  40. #else
    41. 

  41. #define ppc64_runlatch_on()
    42. 

  42. #define ppc64_runlatch_off()
    43. 

  43. #endif /* CONFIG_PPC64 */
    44. 

  44. 

  45. #endif /* _ASM_POWERPC_RUNLATCH_H */
    46.